JAYCO CLASS A MOTOR HOMES
SECTION 4 – VEHICLE OPERATION
4-11
System Layout
The heater / air conditioner unit is located on the outside of the vehicle firewall. In
most modes of operation the unit draws in fresh air from the outside and heats or
cools it before discharging the treated air into the vehicle. Only in the
MAX A/C
mode does the system draw air from inside the vehicle.
Operating Features
The air conditioning system is designed to operate in all modes except VENT,
FLOOR, and OFF. This provides significant moisture, dust and pollen removal for
enhanced passenger comfort.
NOTE:
When outside ambient temperatures are below approximately 40°
F,
the A/C compressor may cycle rapidly or not engage. Use VENT mode (see
below) instead of MAX A/C mode or A/C mode in these temperature conditions to
cool the interior air temperature. For operational safety in the event of the loss of
vacuum, the HVAC system is designed to discharge air through the defrost vents
to provide continuous windshield defogging.
Air Distribution – Mode Control
To achieve the maximum comfort in your motor home, the air must be directed
where it is needed. The mode switch (right of center) gives the driver the ability to
select where the air will flow.
MAX A/C
Air is drawn from the passenger compartment (Re-circulated Air)
and discharged through the dash louvers. This position is used to provide
maximum cooling, and is generally used during extremely hot weather
conditions for initial cool-down periods. Because MAX A/C does not allow
fresh "outside" air into the passenger compartment, it may cause fogging of
the windows, and/or stale air, when used for prolonged periods of time.
Switch to A/C mode periodically if these conditions occur.
A/C
Outside air (Fresh Air) is drawn into the system and discharged through
the dash louvers. These louvers can be adjusted for maximum comfort.
VENT
Outside air (fresh air) is drawn into the system and discharged through
the dash louvers.
OFF
The blower motor does not operate in this mode. The fresh air inlet door
closes, minimizing outside air infiltration into the vehicle.
BI-LEVEL
-
Outside air is drawn into the system and discharged through the
dash louvers, floor outlets. The A/C system operates in BI-LEVEL
mode.
FLOOR
-
Outside air is drawn into the system and discharged through the
floor outlets. The A/C system does not operate in FLOOR
mode.
MIX
-
Outside air is drawn into the system and discharged through the floor
and defrost outlets. The A/C system operates in MIX
mode to provide
windshield defogging.
DEFROST
-
Outside air is drawn into the system and discharged through the
defrost outlets. The A/C system operates in DEFROST
mode to provide
windshield defogging.
NOTE:
In the event of a loss of vacuum, system will automatically switch to
DEFROST MODE.
Summary of Contents for 2015 PRECEPT
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